Knicks president Isiah Thomas flew to his hometown of Chicago yesterday to bring back another athletic piece for the club’s ever-changing puzzle.

According to his agent, 6-9 free agent swingman Eddie Robinson agreed to terms yesterday with the Knicks on a one-year deal, pending his physical this morning.

Robinson is expected to sign today in New York and be in uniform tonight when the Knicks host the Clippers at the Garden to conclude a dizzying week of events.

The bizarre week began with Monday’s firing of Lenny Wilkens’ trusted aide Dick Helm and the promotion of Brendan Suhr to assistant. The Knicks then bought out the miserable Shandon Anderson for about $20 million of his $24 million contract, setting the stage for Robinson. Bought out last week, Robinson was a standout reserve in Charlotte but a dud in Chicago after feuding with coach Scott Skiles.

“It’s done,” Robinson’s agent told The Post. “All parties are coming to New York [last night].”

The Knicks can’t announce the move until Robinson takes his physical. According to a league source, the Knicks offered him the rest of their mid-level exception – $1.3 million.

The signing will not make an immediate impact. In fact, it is believed Robinson will dress tonight and tomorrow in Indiana, but could then be placed on the injured list as he learns the playbook. The Knicks can’t activate anyone from the injured list until after Saturday’s game. So Jamison Brewer could be activated temporarily to fill Anderson’s 12th-man role.

But Thomas isn’t forking over $1.3M for Robinson to be the 12th man despite the swingman logjam. The Robinson addition could bode poorly for struggling small forward Tim Thomas, who has been awful at both ends during the Knicks’ 1-2 start. And it demonstrates the uncertainty brass has over Allan Houston, still weeks away from suiting up.

Wilkens is in love with rookie Trevor Ariza and said he, and not Robinson, could eventually start this season if Tim Thomas falters.

If Robinson, 28, excels in practice – and former teammates Jamal Crawford and Jerome Williams swear he’s a high-flying dynamo – Tim Thomas could become expendable in a trade. Isiah Thomas, assistant GM Jeff Nix and super-scout Dick McGuire were part of the Knick delegation that met Robinson and watched him work out in Chicago.

“When [Robinson] played with Charlotte . . . he hurt us a few times,” said Wilkens, speaking without knowledge of an agreement.

One GM called him “a mistake player.” In Charlotte, though, he combined with Ricky Davis and Brad Miller to make up a bench corps nicknamed “High Voltage.” And it’s known he had a good relationship with coach Paul Silas.

Thomas’ goal when he became president was to make the Knicks more athletic and entertaining, and he’s done that with Ariza, Stephon Marbury, Crawford and now Robinson.